/Engine/Source/Runtime/Core/Public/Math/Range.h
If a range [A, C) does not contain the element X, the original range is returned. Otherwise the range is split into two ranges [A, X) and [X, C), each of which may be empty.
[TArray](API\Runtime\Core\Containers\TArray)< [TRange](API\Runtime\Core\Math\TRange) > Split ( [ElementValueOrConstRef](API\Runtime\Core\Math\TRange\ElementValueOrConstRef) Element ) const